1037 lines
35 KiB
C++
1037 lines
35 KiB
C++
// Scintilla source code edit control
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/** @file LexPython.cxx
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** Lexer for Python.
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**/
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// Copyright 1998-2002 by Neil Hodgson <neilh@scintilla.org>
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// The License.txt file describes the conditions under which this software may be distributed.
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#include <cstdlib>
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#include <cassert>
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#include <cstring>
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#include <string>
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#include <string_view>
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#include <vector>
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#include <map>
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#include <algorithm>
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#include <functional>
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#include "ILexer.h"
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#include "Scintilla.h"
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#include "SciLexer.h"
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#include "StringCopy.h"
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#include "WordList.h"
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#include "LexAccessor.h"
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#include "Accessor.h"
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#include "StyleContext.h"
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#include "CharacterSet.h"
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#include "CharacterCategory.h"
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#include "LexerModule.h"
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#include "OptionSet.h"
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#include "SubStyles.h"
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#include "DefaultLexer.h"
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using namespace Scintilla;
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using namespace Lexilla;
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namespace {
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// Use an unnamed namespace to protect the functions and classes from name conflicts
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/* Notes on f-strings: f-strings are strings prefixed with f (e.g. f'') that may
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have arbitrary expressions in {}. The tokens in the expressions are lexed as if
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they were outside of any string. Expressions may contain { and } characters as
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long as there is a closing } for every {, may be 2+ lines in a triple quoted
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string, and may have a formatting specifier following a ! or :, but both !
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and : are valid inside of a bracketed expression and != is a valid
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expression token even outside of a bracketed expression.
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When in an f-string expression, the lexer keeps track of the state value of
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the f-string and the nesting count for the expression (# of [, (, { seen - # of
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}, ), ] seen). f-strings may be nested (e.g. f'{ a + f"{1+2}"') so a stack of
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states and nesting counts is kept. If a f-string expression continues beyond
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the end of a line, this stack is saved in a std::map that maps a line number to
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the stack at the end of that line. std::vector is used for the stack.
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The PEP for f-strings is at https://www.python.org/dev/peps/pep-0498/
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*/
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struct SingleFStringExpState {
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int state;
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int nestingCount;
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};
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/* kwCDef, kwCTypeName only used for Cython */
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enum kwType { kwOther, kwClass, kwDef, kwImport, kwCDef, kwCTypeName, kwCPDef };
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enum literalsAllowed { litNone = 0, litU = 1, litB = 2, litF = 4 };
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constexpr int indicatorWhitespace = 1;
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bool IsPyComment(Accessor &styler, Sci_Position pos, Sci_Position len) {
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return len > 0 && styler[pos] == '#';
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}
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constexpr bool IsPyStringTypeChar(int ch, literalsAllowed allowed) noexcept {
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return
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((allowed & litB) && (ch == 'b' || ch == 'B')) ||
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((allowed & litU) && (ch == 'u' || ch == 'U')) ||
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((allowed & litF) && (ch == 'f' || ch == 'F'));
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}
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bool IsPyStringStart(int ch, int chNext, int chNext2, literalsAllowed allowed) noexcept {
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if (ch == '\'' || ch == '"')
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return true;
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if (IsPyStringTypeChar(ch, allowed)) {
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if (chNext == '"' || chNext == '\'')
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return true;
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if ((chNext == 'r' || chNext == 'R') && (chNext2 == '"' || chNext2 == '\''))
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return true;
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}
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if ((ch == 'r' || ch == 'R') && (chNext == '"' || chNext == '\''))
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return true;
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return false;
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}
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constexpr bool IsPyFStringState(int st) noexcept {
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return ((st == SCE_P_FCHARACTER) || (st == SCE_P_FSTRING) ||
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(st == SCE_P_FTRIPLE) || (st == SCE_P_FTRIPLEDOUBLE));
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}
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constexpr bool IsPySingleQuoteStringState(int st) noexcept {
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return ((st == SCE_P_CHARACTER) || (st == SCE_P_STRING) ||
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(st == SCE_P_FCHARACTER) || (st == SCE_P_FSTRING));
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}
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constexpr bool IsPyTripleQuoteStringState(int st) noexcept {
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return ((st == SCE_P_TRIPLE) || (st == SCE_P_TRIPLEDOUBLE) ||
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(st == SCE_P_FTRIPLE) || (st == SCE_P_FTRIPLEDOUBLE));
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}
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char GetPyStringQuoteChar(int st) noexcept {
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if ((st == SCE_P_CHARACTER) || (st == SCE_P_FCHARACTER) ||
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(st == SCE_P_TRIPLE) || (st == SCE_P_FTRIPLE))
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return '\'';
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if ((st == SCE_P_STRING) || (st == SCE_P_FSTRING) ||
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(st == SCE_P_TRIPLEDOUBLE) || (st == SCE_P_FTRIPLEDOUBLE))
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return '"';
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return '\0';
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}
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void PushStateToStack(int state, std::vector<SingleFStringExpState> &stack, SingleFStringExpState *¤tFStringExp) {
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SingleFStringExpState single = {state, 0};
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stack.push_back(single);
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currentFStringExp = &stack.back();
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}
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int PopFromStateStack(std::vector<SingleFStringExpState> &stack, SingleFStringExpState *¤tFStringExp) noexcept {
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int state = 0;
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if (!stack.empty()) {
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state = stack.back().state;
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stack.pop_back();
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}
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if (stack.empty()) {
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currentFStringExp = nullptr;
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} else {
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currentFStringExp = &stack.back();
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}
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return state;
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}
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/* Return the state to use for the string starting at i; *nextIndex will be set to the first index following the quote(s) */
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int GetPyStringState(Accessor &styler, Sci_Position i, Sci_PositionU *nextIndex, literalsAllowed allowed) {
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char ch = styler.SafeGetCharAt(i);
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char chNext = styler.SafeGetCharAt(i + 1);
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const int firstIsF = (ch == 'f' || ch == 'F');
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// Advance beyond r, u, or ur prefix (or r, b, or br in Python 2.7+ and r, f, or fr in Python 3.6+), but bail if there are any unexpected chars
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if (ch == 'r' || ch == 'R') {
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i++;
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ch = styler.SafeGetCharAt(i);
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chNext = styler.SafeGetCharAt(i + 1);
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} else if (IsPyStringTypeChar(ch, allowed)) {
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if (chNext == 'r' || chNext == 'R')
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i += 2;
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else
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i += 1;
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ch = styler.SafeGetCharAt(i);
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chNext = styler.SafeGetCharAt(i + 1);
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}
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if (ch != '"' && ch != '\'') {
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*nextIndex = i + 1;
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return SCE_P_DEFAULT;
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}
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if (ch == chNext && ch == styler.SafeGetCharAt(i + 2)) {
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*nextIndex = i + 3;
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if (ch == '"')
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return (firstIsF ? SCE_P_FTRIPLEDOUBLE : SCE_P_TRIPLEDOUBLE);
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else
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return (firstIsF ? SCE_P_FTRIPLE : SCE_P_TRIPLE);
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} else {
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*nextIndex = i + 1;
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if (ch == '"')
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return (firstIsF ? SCE_P_FSTRING : SCE_P_STRING);
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else
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return (firstIsF ? SCE_P_FCHARACTER : SCE_P_CHARACTER);
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}
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}
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inline bool IsAWordChar(int ch, bool unicodeIdentifiers) {
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if (IsASCII(ch))
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return (IsAlphaNumeric(ch) || ch == '.' || ch == '_');
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if (!unicodeIdentifiers)
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return false;
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// Python uses the XID_Continue set from Unicode data
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return IsXidContinue(ch);
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}
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inline bool IsAWordStart(int ch, bool unicodeIdentifiers) {
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if (IsASCII(ch))
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return (IsUpperOrLowerCase(ch) || ch == '_');
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if (!unicodeIdentifiers)
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return false;
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// Python uses the XID_Start set from Unicode data
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return IsXidStart(ch);
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}
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bool IsFirstNonWhitespace(Sci_Position pos, Accessor &styler) {
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const Sci_Position line = styler.GetLine(pos);
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const Sci_Position start_pos = styler.LineStart(line);
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for (Sci_Position i = start_pos; i < pos; i++) {
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const char ch = styler[i];
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if (!(ch == ' ' || ch == '\t'))
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return false;
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}
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return true;
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}
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// Options used for LexerPython
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struct OptionsPython {
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int whingeLevel;
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bool base2or8Literals;
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bool stringsU;
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bool stringsB;
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bool stringsF;
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bool stringsOverNewline;
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bool keywords2NoSubIdentifiers;
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bool fold;
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bool foldQuotes;
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bool foldCompact;
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bool unicodeIdentifiers;
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int identifierAttributes;
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int decoratorAttributes;
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OptionsPython() noexcept {
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whingeLevel = 0;
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base2or8Literals = true;
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stringsU = true;
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stringsB = true;
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stringsF = true;
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stringsOverNewline = false;
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keywords2NoSubIdentifiers = false;
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fold = false;
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foldQuotes = false;
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foldCompact = false;
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unicodeIdentifiers = true;
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identifierAttributes = 0;
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decoratorAttributes = 0;
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}
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literalsAllowed AllowedLiterals() const noexcept {
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literalsAllowed allowedLiterals = stringsU ? litU : litNone;
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if (stringsB)
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allowedLiterals = static_cast<literalsAllowed>(allowedLiterals | litB);
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if (stringsF)
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allowedLiterals = static_cast<literalsAllowed>(allowedLiterals | litF);
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return allowedLiterals;
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}
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};
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const char *const pythonWordListDesc[] = {
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"Keywords",
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"Highlighted identifiers",
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nullptr
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};
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struct OptionSetPython : public OptionSet<OptionsPython> {
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OptionSetPython() {
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DefineProperty("tab.timmy.whinge.level", &OptionsPython::whingeLevel,
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"For Python code, checks whether indenting is consistent. "
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"The default, 0 turns off indentation checking, "
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"1 checks whether each line is potentially inconsistent with the previous line, "
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"2 checks whether any space characters occur before a tab character in the indentation, "
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"3 checks whether any spaces are in the indentation, and "
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"4 checks for any tab characters in the indentation. "
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"1 is a good level to use.");
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DefineProperty("lexer.python.literals.binary", &OptionsPython::base2or8Literals,
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"Set to 0 to not recognise Python 3 binary and octal literals: 0b1011 0o712.");
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DefineProperty("lexer.python.strings.u", &OptionsPython::stringsU,
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"Set to 0 to not recognise Python Unicode literals u\"x\" as used before Python 3.");
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DefineProperty("lexer.python.strings.b", &OptionsPython::stringsB,
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"Set to 0 to not recognise Python 3 bytes literals b\"x\".");
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DefineProperty("lexer.python.strings.f", &OptionsPython::stringsF,
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"Set to 0 to not recognise Python 3.6 f-string literals f\"var={var}\".");
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DefineProperty("lexer.python.strings.over.newline", &OptionsPython::stringsOverNewline,
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"Set to 1 to allow strings to span newline characters.");
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DefineProperty("lexer.python.keywords2.no.sub.identifiers", &OptionsPython::keywords2NoSubIdentifiers,
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"When enabled, it will not style keywords2 items that are used as a sub-identifier. "
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"Example: when set, will not highlight \"foo.open\" when \"open\" is a keywords2 item.");
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DefineProperty("fold", &OptionsPython::fold);
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DefineProperty("fold.quotes.python", &OptionsPython::foldQuotes,
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"This option enables folding multi-line quoted strings when using the Python lexer.");
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DefineProperty("fold.compact", &OptionsPython::foldCompact);
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DefineProperty("lexer.python.unicode.identifiers", &OptionsPython::unicodeIdentifiers,
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"Set to 0 to not recognise Python 3 Unicode identifiers.");
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DefineProperty("lexer.python.identifier.attributes", &OptionsPython::identifierAttributes,
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"Set to 1 to recognise Python identifier attributes.");
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DefineProperty("lexer.python.decorator.attributes", &OptionsPython::decoratorAttributes,
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"Set to 1 to recognise Python decorator attributes.");
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DefineWordListSets(pythonWordListDesc);
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}
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};
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const char styleSubable[] = { SCE_P_IDENTIFIER, 0 };
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LexicalClass lexicalClasses[] = {
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// Lexer Python SCLEX_PYTHON SCE_P_:
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0, "SCE_P_DEFAULT", "default", "White space",
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1, "SCE_P_COMMENTLINE", "comment line", "Comment",
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2, "SCE_P_NUMBER", "literal numeric", "Number",
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3, "SCE_P_STRING", "literal string", "String",
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4, "SCE_P_CHARACTER", "literal string", "Single quoted string",
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5, "SCE_P_WORD", "keyword", "Keyword",
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6, "SCE_P_TRIPLE", "literal string", "Triple quotes",
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7, "SCE_P_TRIPLEDOUBLE", "literal string", "Triple double quotes",
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8, "SCE_P_CLASSNAME", "identifier", "Class name definition",
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9, "SCE_P_DEFNAME", "identifier", "Function or method name definition",
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10, "SCE_P_OPERATOR", "operator", "Operators",
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11, "SCE_P_IDENTIFIER", "identifier", "Identifiers",
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12, "SCE_P_COMMENTBLOCK", "comment", "Comment-blocks",
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13, "SCE_P_STRINGEOL", "error literal string", "End of line where string is not closed",
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14, "SCE_P_WORD2", "identifier", "Highlighted identifiers",
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15, "SCE_P_DECORATOR", "preprocessor", "Decorators",
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16, "SCE_P_FSTRING", "literal string interpolated", "F-String",
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17, "SCE_P_FCHARACTER", "literal string interpolated", "Single quoted f-string",
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18, "SCE_P_FTRIPLE", "literal string interpolated", "Triple quoted f-string",
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19, "SCE_P_FTRIPLEDOUBLE", "literal string interpolated", "Triple double quoted f-string",
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20, "SCE_P_ATTRIBUTE", "identifier", "Attribute of identifier",
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};
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}
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class LexerPython : public DefaultLexer {
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WordList keywords;
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WordList keywords2;
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OptionsPython options;
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OptionSetPython osPython;
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enum { ssIdentifier };
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SubStyles subStyles;
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std::map<Sci_Position, std::vector<SingleFStringExpState> > ftripleStateAtEol;
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public:
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explicit LexerPython() :
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DefaultLexer("python", SCLEX_PYTHON, lexicalClasses, ELEMENTS(lexicalClasses)),
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subStyles(styleSubable, 0x80, 0x40, 0) {
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}
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~LexerPython() override {
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}
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void SCI_METHOD Release() override {
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delete this;
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}
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int SCI_METHOD Version() const override {
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return lvRelease5;
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}
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const char *SCI_METHOD PropertyNames() override {
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return osPython.PropertyNames();
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}
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int SCI_METHOD PropertyType(const char *name) override {
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return osPython.PropertyType(name);
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}
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const char *SCI_METHOD DescribeProperty(const char *name) override {
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return osPython.DescribeProperty(name);
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}
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Sci_Position SCI_METHOD PropertySet(const char *key, const char *val) override;
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const char * SCI_METHOD PropertyGet(const char *key) override {
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return osPython.PropertyGet(key);
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}
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const char *SCI_METHOD DescribeWordListSets() override {
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return osPython.DescribeWordListSets();
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}
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Sci_Position SCI_METHOD WordListSet(int n, const char *wl) override;
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void SCI_METHOD Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
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void SCI_METHOD Fold(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) override;
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void *SCI_METHOD PrivateCall(int, void *) override {
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return nullptr;
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}
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int SCI_METHOD LineEndTypesSupported() override {
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return SC_LINE_END_TYPE_UNICODE;
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}
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int SCI_METHOD AllocateSubStyles(int styleBase, int numberStyles) override {
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return subStyles.Allocate(styleBase, numberStyles);
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}
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int SCI_METHOD SubStylesStart(int styleBase) override {
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return subStyles.Start(styleBase);
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}
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int SCI_METHOD SubStylesLength(int styleBase) override {
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return subStyles.Length(styleBase);
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}
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int SCI_METHOD StyleFromSubStyle(int subStyle) override {
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const int styleBase = subStyles.BaseStyle(subStyle);
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return styleBase;
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}
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int SCI_METHOD PrimaryStyleFromStyle(int style) override {
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return style;
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}
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void SCI_METHOD FreeSubStyles() override {
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subStyles.Free();
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}
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void SCI_METHOD SetIdentifiers(int style, const char *identifiers) override {
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subStyles.SetIdentifiers(style, identifiers);
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}
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int SCI_METHOD DistanceToSecondaryStyles() override {
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return 0;
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}
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const char *SCI_METHOD GetSubStyleBases() override {
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return styleSubable;
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}
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static ILexer5 *LexerFactoryPython() {
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return new LexerPython();
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}
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private:
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void ProcessLineEnd(StyleContext &sc, std::vector<SingleFStringExpState> &fstringStateStack, SingleFStringExpState *¤tFStringExp, bool &inContinuedString);
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};
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Sci_Position SCI_METHOD LexerPython::PropertySet(const char *key, const char *val) {
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if (osPython.PropertySet(&options, key, val)) {
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return 0;
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}
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return -1;
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}
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Sci_Position SCI_METHOD LexerPython::WordListSet(int n, const char *wl) {
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WordList *wordListN = nullptr;
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switch (n) {
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case 0:
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wordListN = &keywords;
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break;
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case 1:
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wordListN = &keywords2;
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break;
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default:
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break;
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}
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Sci_Position firstModification = -1;
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if (wordListN) {
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WordList wlNew;
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wlNew.Set(wl);
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if (*wordListN != wlNew) {
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wordListN->Set(wl);
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firstModification = 0;
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}
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}
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return firstModification;
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}
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void LexerPython::ProcessLineEnd(StyleContext &sc, std::vector<SingleFStringExpState> &fstringStateStack, SingleFStringExpState *¤tFStringExp, bool &inContinuedString) {
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long deepestSingleStateIndex = -1;
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unsigned long i;
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// Find the deepest single quote state because that string will end; no \ continuation in f-string
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for (i = 0; i < fstringStateStack.size(); i++) {
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if (IsPySingleQuoteStringState(fstringStateStack[i].state)) {
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deepestSingleStateIndex = i;
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break;
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}
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}
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if (deepestSingleStateIndex != -1) {
|
|
sc.SetState(fstringStateStack[deepestSingleStateIndex].state);
|
|
while (fstringStateStack.size() > static_cast<unsigned long>(deepestSingleStateIndex)) {
|
|
PopFromStateStack(fstringStateStack, currentFStringExp);
|
|
}
|
|
}
|
|
if (!fstringStateStack.empty()) {
|
|
std::pair<Sci_Position, std::vector<SingleFStringExpState> > val;
|
|
val.first = sc.currentLine;
|
|
val.second = fstringStateStack;
|
|
|
|
ftripleStateAtEol.insert(val);
|
|
}
|
|
|
|
if ((sc.state == SCE_P_DEFAULT)
|
|
|| IsPyTripleQuoteStringState(sc.state)) {
|
|
// Perform colourisation of white space and triple quoted strings at end of each line to allow
|
|
// tab marking to work inside white space and triple quoted strings
|
|
sc.SetState(sc.state);
|
|
}
|
|
if (IsPySingleQuoteStringState(sc.state)) {
|
|
if (inContinuedString || options.stringsOverNewline) {
|
|
inContinuedString = false;
|
|
} else {
|
|
sc.ChangeState(SCE_P_STRINGEOL);
|
|
sc.ForwardSetState(SCE_P_DEFAULT);
|
|
}
|
|
}
|
|
}
|
|
|
|
void SCI_METHOD LexerPython::Lex(Sci_PositionU startPos, Sci_Position length, int initStyle, IDocument *pAccess) {
|
|
Accessor styler(pAccess, nullptr);
|
|
|
|
// Track whether in f-string expression; vector is used for a stack to
|
|
// handle nested f-strings such as f"""{f'''{f"{f'{1}'}"}'''}"""
|
|
std::vector<SingleFStringExpState> fstringStateStack;
|
|
SingleFStringExpState *currentFStringExp = nullptr;
|
|
|
|
const Sci_Position endPos = startPos + length;
|
|
|
|
// Backtrack to previous line in case need to fix its tab whinging
|
|
Sci_Position lineCurrent = styler.GetLine(startPos);
|
|
if (startPos > 0) {
|
|
if (lineCurrent > 0) {
|
|
lineCurrent--;
|
|
// Look for backslash-continued lines
|
|
while (lineCurrent > 0) {
|
|
const Sci_Position eolPos = styler.LineStart(lineCurrent) - 1;
|
|
const int eolStyle = styler.StyleAt(eolPos);
|
|
if (eolStyle == SCE_P_STRING
|
|
|| eolStyle == SCE_P_CHARACTER
|
|
|| eolStyle == SCE_P_STRINGEOL) {
|
|
lineCurrent -= 1;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
startPos = styler.LineStart(lineCurrent);
|
|
}
|
|
initStyle = startPos == 0 ? SCE_P_DEFAULT : styler.StyleAt(startPos - 1);
|
|
}
|
|
|
|
const literalsAllowed allowedLiterals = options.AllowedLiterals();
|
|
|
|
initStyle = initStyle & 31;
|
|
if (initStyle == SCE_P_STRINGEOL) {
|
|
initStyle = SCE_P_DEFAULT;
|
|
}
|
|
|
|
// Set up fstate stack from last line and remove any subsequent ftriple at eol states
|
|
std::map<Sci_Position, std::vector<SingleFStringExpState> >::iterator it;
|
|
it = ftripleStateAtEol.find(lineCurrent - 1);
|
|
if (it != ftripleStateAtEol.end() && !it->second.empty()) {
|
|
fstringStateStack = it->second;
|
|
currentFStringExp = &fstringStateStack.back();
|
|
}
|
|
it = ftripleStateAtEol.lower_bound(lineCurrent);
|
|
if (it != ftripleStateAtEol.end()) {
|
|
ftripleStateAtEol.erase(it, ftripleStateAtEol.end());
|
|
}
|
|
|
|
kwType kwLast = kwOther;
|
|
int spaceFlags = 0;
|
|
styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
|
|
bool base_n_number = false;
|
|
|
|
const WordClassifier &classifierIdentifiers = subStyles.Classifier(SCE_P_IDENTIFIER);
|
|
|
|
StyleContext sc(startPos, endPos - startPos, initStyle, styler);
|
|
|
|
bool indentGood = true;
|
|
Sci_Position startIndicator = sc.currentPos;
|
|
bool inContinuedString = false;
|
|
|
|
for (; sc.More(); sc.Forward()) {
|
|
|
|
if (sc.atLineStart) {
|
|
styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
|
|
indentGood = true;
|
|
if (options.whingeLevel == 1) {
|
|
indentGood = (spaceFlags & wsInconsistent) == 0;
|
|
} else if (options.whingeLevel == 2) {
|
|
indentGood = (spaceFlags & wsSpaceTab) == 0;
|
|
} else if (options.whingeLevel == 3) {
|
|
indentGood = (spaceFlags & wsSpace) == 0;
|
|
} else if (options.whingeLevel == 4) {
|
|
indentGood = (spaceFlags & wsTab) == 0;
|
|
}
|
|
if (!indentGood) {
|
|
styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 0);
|
|
startIndicator = sc.currentPos;
|
|
}
|
|
}
|
|
|
|
if (sc.atLineEnd) {
|
|
ProcessLineEnd(sc, fstringStateStack, currentFStringExp, inContinuedString);
|
|
lineCurrent++;
|
|
if (!sc.More())
|
|
break;
|
|
}
|
|
|
|
bool needEOLCheck = false;
|
|
|
|
|
|
if (sc.state == SCE_P_OPERATOR) {
|
|
kwLast = kwOther;
|
|
sc.SetState(SCE_P_DEFAULT);
|
|
} else if (sc.state == SCE_P_NUMBER) {
|
|
if (!IsAWordChar(sc.ch, false) &&
|
|
!(!base_n_number && ((sc.ch == '+' || sc.ch == '-') && (sc.chPrev == 'e' || sc.chPrev == 'E')))) {
|
|
sc.SetState(SCE_P_DEFAULT);
|
|
}
|
|
} else if (sc.state == SCE_P_IDENTIFIER) {
|
|
if ((sc.ch == '.') || (!IsAWordChar(sc.ch, options.unicodeIdentifiers))) {
|
|
char s[100];
|
|
sc.GetCurrent(s, sizeof(s));
|
|
int style = SCE_P_IDENTIFIER;
|
|
if ((kwLast == kwImport) && (strcmp(s, "as") == 0)) {
|
|
style = SCE_P_WORD;
|
|
} else if (keywords.InList(s)) {
|
|
style = SCE_P_WORD;
|
|
} else if (kwLast == kwClass) {
|
|
style = SCE_P_CLASSNAME;
|
|
} else if (kwLast == kwDef) {
|
|
style = SCE_P_DEFNAME;
|
|
} else if (kwLast == kwCDef || kwLast == kwCPDef) {
|
|
Sci_Position pos = sc.currentPos;
|
|
unsigned char ch = styler.SafeGetCharAt(pos, '\0');
|
|
while (ch != '\0') {
|
|
if (ch == '(') {
|
|
style = SCE_P_DEFNAME;
|
|
break;
|
|
} else if (ch == ':') {
|
|
style = SCE_P_CLASSNAME;
|
|
break;
|
|
} else if (ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r') {
|
|
pos++;
|
|
ch = styler.SafeGetCharAt(pos, '\0');
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
} else if (keywords2.InList(s)) {
|
|
if (options.keywords2NoSubIdentifiers) {
|
|
// We don't want to highlight keywords2
|
|
// that are used as a sub-identifier,
|
|
// i.e. not open in "foo.open".
|
|
const Sci_Position pos = styler.GetStartSegment() - 1;
|
|
if (pos < 0 || (styler.SafeGetCharAt(pos, '\0') != '.'))
|
|
style = SCE_P_WORD2;
|
|
} else {
|
|
style = SCE_P_WORD2;
|
|
}
|
|
} else {
|
|
const int subStyle = classifierIdentifiers.ValueFor(s);
|
|
if (subStyle >= 0) {
|
|
style = subStyle;
|
|
}
|
|
if (options.identifierAttributes > 0 || options.decoratorAttributes > 0) {
|
|
// Does the user even want attributes styled?
|
|
Sci_Position pos = styler.GetStartSegment() - 1;
|
|
unsigned char ch = styler.SafeGetCharAt(pos, '\0');
|
|
while (ch != '\0' && (ch == '.' || ch == ' ' || ch == '\\' || ch == '\t' || ch == '\n' || ch == '\r')) {
|
|
// Backwards search for a . while only allowing certain valid characters
|
|
if (IsAWordChar(ch, options.unicodeIdentifiers)) {
|
|
break;
|
|
}
|
|
pos--;
|
|
ch = styler.SafeGetCharAt(pos, '\0');
|
|
}
|
|
if (pos < 0 || ch == '.') {
|
|
// Is this an attribute we could style? if it is, do as asked
|
|
bool isComment = false;
|
|
bool isDecoratorAttribute = false;
|
|
const Sci_Position attrLine = styler.GetLine(pos);
|
|
for (Sci_Position i = styler.LineStart(attrLine); i < pos; i++) {
|
|
const char attrCh = styler[i];
|
|
if (attrCh == '@')
|
|
isDecoratorAttribute = true;
|
|
if (attrCh == '#')
|
|
isComment = true;
|
|
// Detect if this attribute belongs to a decorator
|
|
if (!(ch == ' ' || ch == '\t'))
|
|
break;
|
|
}
|
|
if (((isDecoratorAttribute) && (!isComment)) && (((options.decoratorAttributes == 1) && (style == SCE_P_IDENTIFIER)) || (options.decoratorAttributes == 2))){
|
|
// Style decorator attributes as decorators but respect already styled identifiers (unless requested to ignore already styled identifiers)
|
|
style = SCE_P_DECORATOR;
|
|
}
|
|
if (((!isDecoratorAttribute) && (!isComment)) && (((options.identifierAttributes == 1) && (style == SCE_P_IDENTIFIER)) || (options.identifierAttributes == 2))){
|
|
// Style attributes and ignore decorator attributes but respect already styled identifiers (unless requested to ignore already styled identifiers)
|
|
style = SCE_P_ATTRIBUTE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
sc.ChangeState(style);
|
|
sc.SetState(SCE_P_DEFAULT);
|
|
if (style == SCE_P_WORD) {
|
|
if (0 == strcmp(s, "class"))
|
|
kwLast = kwClass;
|
|
else if (0 == strcmp(s, "def"))
|
|
kwLast = kwDef;
|
|
else if (0 == strcmp(s, "import"))
|
|
kwLast = kwImport;
|
|
else if (0 == strcmp(s, "cdef"))
|
|
kwLast = kwCDef;
|
|
else if (0 == strcmp(s, "cpdef"))
|
|
kwLast = kwCPDef;
|
|
else if (0 == strcmp(s, "cimport"))
|
|
kwLast = kwImport;
|
|
else if (kwLast != kwCDef && kwLast != kwCPDef)
|
|
kwLast = kwOther;
|
|
} else if (kwLast != kwCDef && kwLast != kwCPDef) {
|
|
kwLast = kwOther;
|
|
}
|
|
}
|
|
} else if ((sc.state == SCE_P_COMMENTLINE) || (sc.state == SCE_P_COMMENTBLOCK)) {
|
|
if (sc.ch == '\r' || sc.ch == '\n') {
|
|
sc.SetState(SCE_P_DEFAULT);
|
|
}
|
|
} else if (sc.state == SCE_P_DECORATOR) {
|
|
if (!IsAWordStart(sc.ch, options.unicodeIdentifiers)) {
|
|
sc.SetState(SCE_P_DEFAULT);
|
|
}
|
|
} else if (IsPySingleQuoteStringState(sc.state)) {
|
|
if (sc.ch == '\\') {
|
|
if ((sc.chNext == '\r') && (sc.GetRelative(2) == '\n')) {
|
|
sc.Forward();
|
|
}
|
|
if (sc.chNext == '\n' || sc.chNext == '\r') {
|
|
inContinuedString = true;
|
|
} else {
|
|
// Don't roll over the newline.
|
|
sc.Forward();
|
|
}
|
|
} else if (sc.ch == GetPyStringQuoteChar(sc.state)) {
|
|
sc.ForwardSetState(SCE_P_DEFAULT);
|
|
needEOLCheck = true;
|
|
}
|
|
} else if ((sc.state == SCE_P_TRIPLE) || (sc.state == SCE_P_FTRIPLE)) {
|
|
if (sc.ch == '\\') {
|
|
sc.Forward();
|
|
} else if (sc.Match(R"(''')")) {
|
|
sc.Forward();
|
|
sc.Forward();
|
|
sc.ForwardSetState(SCE_P_DEFAULT);
|
|
needEOLCheck = true;
|
|
}
|
|
} else if ((sc.state == SCE_P_TRIPLEDOUBLE) || (sc.state == SCE_P_FTRIPLEDOUBLE)) {
|
|
if (sc.ch == '\\') {
|
|
sc.Forward();
|
|
} else if (sc.Match(R"(""")")) {
|
|
sc.Forward();
|
|
sc.Forward();
|
|
sc.ForwardSetState(SCE_P_DEFAULT);
|
|
needEOLCheck = true;
|
|
}
|
|
}
|
|
|
|
// Note if used and not if else because string states also match
|
|
// some of the above clauses
|
|
if (IsPyFStringState(sc.state) && sc.ch == '{') {
|
|
if (sc.chNext == '{') {
|
|
sc.Forward();
|
|
} else {
|
|
PushStateToStack(sc.state, fstringStateStack, currentFStringExp);
|
|
sc.ForwardSetState(SCE_P_DEFAULT);
|
|
}
|
|
needEOLCheck = true;
|
|
}
|
|
|
|
// If in an f-string expression, check for the ending quote(s)
|
|
// and end f-string to handle syntactically incorrect cases like
|
|
// f'{' and f"""{"""
|
|
if (!fstringStateStack.empty() && (sc.ch == '\'' || sc.ch == '"')) {
|
|
long matching_stack_i = -1;
|
|
for (unsigned long stack_i = 0; stack_i < fstringStateStack.size() && matching_stack_i == -1; stack_i++) {
|
|
const int stack_state = fstringStateStack[stack_i].state;
|
|
const char quote = GetPyStringQuoteChar(stack_state);
|
|
if (sc.ch == quote) {
|
|
if (IsPySingleQuoteStringState(stack_state)) {
|
|
matching_stack_i = stack_i;
|
|
} else if (quote == '"' ? sc.Match(R"(""")") : sc.Match("'''")) {
|
|
matching_stack_i = stack_i;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (matching_stack_i != -1) {
|
|
sc.SetState(fstringStateStack[matching_stack_i].state);
|
|
if (IsPyTripleQuoteStringState(fstringStateStack[matching_stack_i].state)) {
|
|
sc.Forward();
|
|
sc.Forward();
|
|
}
|
|
sc.ForwardSetState(SCE_P_DEFAULT);
|
|
needEOLCheck = true;
|
|
|
|
while (fstringStateStack.size() > static_cast<unsigned long>(matching_stack_i)) {
|
|
PopFromStateStack(fstringStateStack, currentFStringExp);
|
|
}
|
|
}
|
|
}
|
|
// End of code to find the end of a state
|
|
|
|
if (!indentGood && !IsASpaceOrTab(sc.ch)) {
|
|
styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 1);
|
|
startIndicator = sc.currentPos;
|
|
indentGood = true;
|
|
}
|
|
|
|
// One cdef or cpdef line, clear kwLast only at end of line
|
|
if ((kwLast == kwCDef || kwLast == kwCPDef) && sc.atLineEnd) {
|
|
kwLast = kwOther;
|
|
}
|
|
|
|
// State exit code may have moved on to end of line
|
|
if (needEOLCheck && sc.atLineEnd) {
|
|
ProcessLineEnd(sc, fstringStateStack, currentFStringExp, inContinuedString);
|
|
lineCurrent++;
|
|
styler.IndentAmount(lineCurrent, &spaceFlags, IsPyComment);
|
|
if (!sc.More())
|
|
break;
|
|
}
|
|
|
|
// If in f-string expression, check for }, :, ! to resume f-string state or update nesting count
|
|
if (currentFStringExp && !IsPySingleQuoteStringState(sc.state) && !IsPyTripleQuoteStringState(sc.state)) {
|
|
if (currentFStringExp->nestingCount == 0 && (sc.ch == '}' || sc.ch == ':' || (sc.ch == '!' && sc.chNext != '='))) {
|
|
sc.SetState(PopFromStateStack(fstringStateStack, currentFStringExp));
|
|
} else {
|
|
if (sc.ch == '{' || sc.ch == '[' || sc.ch == '(') {
|
|
currentFStringExp->nestingCount++;
|
|
} else if (sc.ch == '}' || sc.ch == ']' || sc.ch == ')') {
|
|
currentFStringExp->nestingCount--;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check for a new state starting character
|
|
if (sc.state == SCE_P_DEFAULT) {
|
|
if (IsADigit(sc.ch) || (sc.ch == '.' && IsADigit(sc.chNext))) {
|
|
if (sc.ch == '0' && (sc.chNext == 'x' || sc.chNext == 'X')) {
|
|
base_n_number = true;
|
|
sc.SetState(SCE_P_NUMBER);
|
|
} else if (sc.ch == '0' &&
|
|
(sc.chNext == 'o' || sc.chNext == 'O' || sc.chNext == 'b' || sc.chNext == 'B')) {
|
|
if (options.base2or8Literals) {
|
|
base_n_number = true;
|
|
sc.SetState(SCE_P_NUMBER);
|
|
} else {
|
|
sc.SetState(SCE_P_NUMBER);
|
|
sc.ForwardSetState(SCE_P_IDENTIFIER);
|
|
}
|
|
} else {
|
|
base_n_number = false;
|
|
sc.SetState(SCE_P_NUMBER);
|
|
}
|
|
} else if (isoperator(sc.ch) || sc.ch == '`') {
|
|
sc.SetState(SCE_P_OPERATOR);
|
|
} else if (sc.ch == '#') {
|
|
sc.SetState(sc.chNext == '#' ? SCE_P_COMMENTBLOCK : SCE_P_COMMENTLINE);
|
|
} else if (sc.ch == '@') {
|
|
if (IsFirstNonWhitespace(sc.currentPos, styler))
|
|
sc.SetState(SCE_P_DECORATOR);
|
|
else
|
|
sc.SetState(SCE_P_OPERATOR);
|
|
} else if (IsPyStringStart(sc.ch, sc.chNext, sc.GetRelative(2), allowedLiterals)) {
|
|
Sci_PositionU nextIndex = 0;
|
|
sc.SetState(GetPyStringState(styler, sc.currentPos, &nextIndex, allowedLiterals));
|
|
while (nextIndex > (sc.currentPos + 1) && sc.More()) {
|
|
sc.Forward();
|
|
}
|
|
} else if (IsAWordStart(sc.ch, options.unicodeIdentifiers)) {
|
|
sc.SetState(SCE_P_IDENTIFIER);
|
|
}
|
|
}
|
|
}
|
|
styler.IndicatorFill(startIndicator, sc.currentPos, indicatorWhitespace, 0);
|
|
sc.Complete();
|
|
}
|
|
|
|
static bool IsCommentLine(Sci_Position line, Accessor &styler) {
|
|
const Sci_Position pos = styler.LineStart(line);
|
|
const Sci_Position eol_pos = styler.LineStart(line + 1) - 1;
|
|
for (Sci_Position i = pos; i < eol_pos; i++) {
|
|
const char ch = styler[i];
|
|
if (ch == '#')
|
|
return true;
|
|
else if (ch != ' ' && ch != '\t')
|
|
return false;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool IsQuoteLine(Sci_Position line, const Accessor &styler) {
|
|
const int style = styler.StyleAt(styler.LineStart(line)) & 31;
|
|
return IsPyTripleQuoteStringState(style);
|
|
}
|
|
|
|
|
|
void SCI_METHOD LexerPython::Fold(Sci_PositionU startPos, Sci_Position length, int /*initStyle - unused*/, IDocument *pAccess) {
|
|
if (!options.fold)
|
|
return;
|
|
|
|
Accessor styler(pAccess, nullptr);
|
|
|
|
const Sci_Position maxPos = startPos + length;
|
|
const Sci_Position maxLines = (maxPos == styler.Length()) ? styler.GetLine(maxPos) : styler.GetLine(maxPos - 1); // Requested last line
|
|
const Sci_Position docLines = styler.GetLine(styler.Length()); // Available last line
|
|
|
|
// Backtrack to previous non-blank line so we can determine indent level
|
|
// for any white space lines (needed esp. within triple quoted strings)
|
|
// and so we can fix any preceding fold level (which is why we go back
|
|
// at least one line in all cases)
|
|
int spaceFlags = 0;
|
|
Sci_Position lineCurrent = styler.GetLine(startPos);
|
|
int indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, nullptr);
|
|
while (lineCurrent > 0) {
|
|
lineCurrent--;
|
|
indentCurrent = styler.IndentAmount(lineCurrent, &spaceFlags, nullptr);
|
|
if (!(indentCurrent & SC_FOLDLEVELWHITEFLAG) &&
|
|
(!IsCommentLine(lineCurrent, styler)) &&
|
|
(!IsQuoteLine(lineCurrent, styler)))
|
|
break;
|
|
}
|
|
int indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
|
|
|
|
// Set up initial loop state
|
|
startPos = styler.LineStart(lineCurrent);
|
|
int prev_state = SCE_P_DEFAULT & 31;
|
|
if (lineCurrent >= 1)
|
|
prev_state = styler.StyleAt(startPos - 1) & 31;
|
|
int prevQuote = options.foldQuotes && IsPyTripleQuoteStringState(prev_state);
|
|
|
|
// Process all characters to end of requested range or end of any triple quote
|
|
//that hangs over the end of the range. Cap processing in all cases
|
|
// to end of document (in case of unclosed quote at end).
|
|
while ((lineCurrent <= docLines) && ((lineCurrent <= maxLines) || prevQuote)) {
|
|
|
|
// Gather info
|
|
int lev = indentCurrent;
|
|
Sci_Position lineNext = lineCurrent + 1;
|
|
int indentNext = indentCurrent;
|
|
int quote = false;
|
|
if (lineNext <= docLines) {
|
|
// Information about next line is only available if not at end of document
|
|
indentNext = styler.IndentAmount(lineNext, &spaceFlags, nullptr);
|
|
const Sci_Position lookAtPos = (styler.LineStart(lineNext) == styler.Length()) ? styler.Length() - 1 : styler.LineStart(lineNext);
|
|
const int style = styler.StyleAt(lookAtPos) & 31;
|
|
quote = options.foldQuotes && IsPyTripleQuoteStringState(style);
|
|
}
|
|
const bool quote_start = (quote && !prevQuote);
|
|
const bool quote_continue = (quote && prevQuote);
|
|
if (!quote || !prevQuote)
|
|
indentCurrentLevel = indentCurrent & SC_FOLDLEVELNUMBERMASK;
|
|
if (quote)
|
|
indentNext = indentCurrentLevel;
|
|
if (indentNext & SC_FOLDLEVELWHITEFLAG)
|
|
indentNext = SC_FOLDLEVELWHITEFLAG | indentCurrentLevel;
|
|
|
|
if (quote_start) {
|
|
// Place fold point at start of triple quoted string
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
|
} else if (quote_continue || prevQuote) {
|
|
// Add level to rest of lines in the string
|
|
lev = lev + 1;
|
|
}
|
|
|
|
// Skip past any blank lines for next indent level info; we skip also
|
|
// comments (all comments, not just those starting in column 0)
|
|
// which effectively folds them into surrounding code rather
|
|
// than screwing up folding. If comments end file, use the min
|
|
// comment indent as the level after
|
|
|
|
int minCommentLevel = indentCurrentLevel;
|
|
while (!quote &&
|
|
(lineNext < docLines) &&
|
|
((indentNext & SC_FOLDLEVELWHITEFLAG) || (IsCommentLine(lineNext, styler)))) {
|
|
|
|
if (IsCommentLine(lineNext, styler) && indentNext < minCommentLevel) {
|
|
minCommentLevel = indentNext;
|
|
}
|
|
|
|
lineNext++;
|
|
indentNext = styler.IndentAmount(lineNext, &spaceFlags, nullptr);
|
|
}
|
|
|
|
const int levelAfterComments = ((lineNext < docLines) ? indentNext & SC_FOLDLEVELNUMBERMASK : minCommentLevel);
|
|
const int levelBeforeComments = std::max(indentCurrentLevel, levelAfterComments);
|
|
|
|
// Now set all the indent levels on the lines we skipped
|
|
// Do this from end to start. Once we encounter one line
|
|
// which is indented more than the line after the end of
|
|
// the comment-block, use the level of the block before
|
|
|
|
Sci_Position skipLine = lineNext;
|
|
int skipLevel = levelAfterComments;
|
|
|
|
while (--skipLine > lineCurrent) {
|
|
const int skipLineIndent = styler.IndentAmount(skipLine, &spaceFlags, nullptr);
|
|
|
|
if (options.foldCompact) {
|
|
if ((skipLineIndent & SC_FOLDLEVELNUMBERMASK) > levelAfterComments)
|
|
skipLevel = levelBeforeComments;
|
|
|
|
const int whiteFlag = skipLineIndent & SC_FOLDLEVELWHITEFLAG;
|
|
|
|
styler.SetLevel(skipLine, skipLevel | whiteFlag);
|
|
} else {
|
|
if ((skipLineIndent & SC_FOLDLEVELNUMBERMASK) > levelAfterComments &&
|
|
!(skipLineIndent & SC_FOLDLEVELWHITEFLAG) &&
|
|
!IsCommentLine(skipLine, styler))
|
|
skipLevel = levelBeforeComments;
|
|
|
|
styler.SetLevel(skipLine, skipLevel);
|
|
}
|
|
}
|
|
|
|
// Set fold header on non-quote line
|
|
if (!quote && !(indentCurrent & SC_FOLDLEVELWHITEFLAG)) {
|
|
if ((indentCurrent & SC_FOLDLEVELNUMBERMASK) < (indentNext & SC_FOLDLEVELNUMBERMASK))
|
|
lev |= SC_FOLDLEVELHEADERFLAG;
|
|
}
|
|
|
|
// Keep track of triple quote state of previous line
|
|
prevQuote = quote;
|
|
|
|
// Set fold level for this line and move to next line
|
|
styler.SetLevel(lineCurrent, options.foldCompact ? lev : lev & ~SC_FOLDLEVELWHITEFLAG);
|
|
indentCurrent = indentNext;
|
|
lineCurrent = lineNext;
|
|
}
|
|
|
|
// NOTE: Cannot set level of last line here because indentCurrent doesn't have
|
|
// header flag set; the loop above is crafted to take care of this case!
|
|
//styler.SetLevel(lineCurrent, indentCurrent);
|
|
}
|
|
|
|
LexerModule lmPython(SCLEX_PYTHON, LexerPython::LexerFactoryPython, "python",
|
|
pythonWordListDesc);
|